TRIBO produce Plunger, made from solid Cemented Carbide, up to 150 mm (5,9
in) in diameter and 1500 mm (59 in) in length. We also manufacture Tungsten
Carbide coated Steel-plunger. For the coating TRIBO produce self special HVOF
spray powder with 88TC/12Co composition for receiving lowest porosity after
spraying process As additional service for our customers we make refinishing or
refurbishment of used full Cemented Carbide plungers and coated steel plungers
too. We produce our goods on the highest level in market from powder handling ,
pressing, sinter hipping (see article 3 in publication), finishing and testing.
TRIBO super finished surface maximum is Ra =0,005 micron and Rz= 0,05 micron.

All Plungers are strictly tested by the independent TÜV Nord MPA organization
The following tests are obligatory: ultrasonic test, eddy current test,
penetration test and 100% visual surface control under magnification with camera
system.

Results of the tests are documented and given to the costumer with the so called
plunger file. The detailed production process and the single steps of the test
methods are specified in the
Plunger specification.

Liners

Liners made from solid cemented carbide were used in hyper compressors for
the production of low density polyethylene (LDPE) To resist the extreme stress
the cemented carbide liner is reinforced or double reinforced in a steel bushing
system.. For these products we use also special designed raw materials from
selected suppliers for making the blanks. With highest precision TRIBO
manufacture the Cemented Carbide liners and the steel bushing systems
completely.

All parts are tested by the independent TÜV Nord MPA organization too. All
Details of manufacturing process and steps of the Test methods even the packing
are specified in in the
Liner specification